Toroidal deflection winding for cathode ray tube having in-line guns, wide deflection angle and large screen

Abstract

A toroidal vertical deflection winding for use with a yoke designed for a large screen, color cathode ray tube having in-line guns and a wide deflection angle, the winding constructed to achieve deflection and self-convergence of the electron beams over the entire screen of the tube without coma effect, the winding comprised of a frustrum-shaped magnetic core with three quarter-section primary clusters of toroidally wound conductors formed thereon in predetermined arcs, the conductors of at least one of said primary clusters being non-radially wound, said conductors being positioned generally geometrically parallel to each other and said primary clusters having substantially predetermined numerical conductor relationship.

What I claim is: 
     
       1. A vertical deflection winding for use with a large screen, color cathode ray tube having in-line guns and wide deflection angle, having an annular core with front and rear edges and having toroidally wound conductors symmetrically located about a vertical plane passing through the longitudinal axis of said core and symmetrically located about a horizontal plane passing through said longitudinal axis comprising three primary clusters of said conductors positioned on the front edge of each quarter section of said core on predetermined arcs substantially located at angles of 10°, 50° and 90° measured from said vertical plane, said primary clusters having respective conductor numerical ratios of substantially 48, 25 and 7, the conductors of said clusters being substantially uniformly distributed on said rear edge of said core over a range of substantially 30° to 90° measured from said vertical plane. 
     
     
       2. The vertical deflection winding of claim 1 in which all three of said primary clusters are non-radially wound. 
     
     
       3. The vertical deflection winding of claim 1 in which two of said primary clusters are radially wound and in which one of said primary clusters is non-radially wound. 
     
     
       4. The vertical deflection winding of claim 1 in which an edge of said core is provided with cluster-positioning serrations. 
     
     
       5. The vertical deflection winding of claim 4 in which said cluster-positioning serrations are formed on said edge. 
     
     
       6. The vertical deflection winding of claim 4 in which said cluster-positioning serrations are formed on a non-ferrous ring positioned on said edge. 
     
     
       7. The vertical deflection winding of claim 1 in which at least one of said primary clusters is comprised of at least two sub-clusters.